skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Surrogate modeling for efficiently, accurately and conservatively estimating measures of risk

Journal Article · · Reliability Engineering and System Safety

We present a surrogate modeling framework for conservatively estimating measures of risk from limited realizations of an expensive physical experiment or computational simulation. Risk measures combine objective probabilities with the subjective values of a decision maker to quantify anticipated outcomes. Given a set of samples, we construct a surrogate model that produces estimates of risk measures that are always greater than their empirical approximations obtained from the training data. These surrogate models limit over-confidence in reliability and safety assessments and produce estimates of risk measures that converge much faster to the true value than purely sample-based estimates. We first detail the construction of conservative surrogate models that can be tailored to a stakeholder’s risk preferences and then present an approach, based on stochastic orders, for constructing surrogate models that are conservative with respect to families of risk measures. Our surrogate models include biases that permit them to conservatively estimate the target risk measures. We provide theoretical results that show that these biases decay at the same rate as the L2 error in the surrogate model. Numerical demonstrations confirm that risk-adapted surrogate models do indeed overestimate the target risk measures while converging at the expected rate.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
NA0003525
OSTI ID:
1845389
Report Number(s):
SAND2022-1272J; 703227
Journal Information:
Reliability Engineering and System Safety, Vol. 221; ISSN 0951-8320
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

Subset simulation for problems with strongly non-Gaussian, highly anisotropic, and degenerate distributions journal March 2021
Accelerated subset simulation with neural networks for reliability analysis journal June 2012
An Old-New Concept of Convex risk Measures: the Optimized Certainty Equivalent journal July 2007
Fast surrogate modeling using dimensionality reduction in model inputs and field output: Application to additive manufacturing journal September 2020
Cross-entropy based importance sampling for stochastic simulation models journal November 2019
Hamiltonian Monte Carlo methods for Subset Simulation in reliability analysis journal January 2019
Sparse polynomial chaos expansions and adaptive stochastic finite elements using a regression approach journal June 2008
Risk-Averse PDE-Constrained Optimization Using the Conditional Value-At-Risk journal January 2016
Coherent Measures of Risk journal July 1999
Annealed importance sampling journal April 2001
Active Subspace Methods in Theory and Practice: Applications to Kriging Surfaces journal January 2014
Conservative strategy-based ensemble surrogate model for optimal groundwater remediation design at DNAPLs-contaminated sites journal August 2017
Reliability analysis with stratified importance sampling based on adaptive Kriging journal May 2020
Regularity and Generalized Polynomial Chaos Approximation of Parametric and Random Second-Order Hyperbolic Partial Differential Equations journal July 2012
Information Reuse for Importance Sampling in Reliability-Based Design Optimization journal September 2020
Risk Tuning with Generalized Linear Regression journal August 2008
Adaptive Reduced-Order Model Construction for Conditional Value-at-Risk Estimation journal January 2020
Particle swarm optimization trained neural network for structural failure prediction of multistoried RC buildings journal January 2016
An Adaptive Sampling Approach for Solving PDEs with Uncertain Inputs and Evaluating Risk conference January 2017
Multidisciplinary Risk-Adaptive Set-Based Design of Supercavitating Hydrofoils journal August 2019
Efficient Global Reliability Analysis for Nonlinear Implicit Performance Functions journal October 2008
SciPy 1.0: fundamental algorithms for scientific computing in Python journal February 2020
Probability of failure sensitivity analysis using polynomial expansion journal April 2017
Polynomial chaos expansions for dependent random variables journal July 2019
Stable architectures for deep neural networks journal December 2017
Adaptive subset searching-based deep neural network method for structural reliability analysis journal September 2021
Distribution-free polynomial chaos expansion surrogate models for efficient structural reliability analysis journal January 2021
Conditional-Value-at-Risk Estimation via Reduced-Order Models journal January 2018
Adaptive surrogate model with active refinement combining Kriging and a trust region method journal September 2017
Optimization with Stochastic Dominance Constraints journal January 2003
Surrogate model uncertainty quantification for reliability-based design optimization journal December 2019
Convergence rates for sparse chaos approximations of elliptic problems with stochastic coefficients journal April 2007
Convex measures of risk and trading constraints journal October 2002
Monte Carlo Methods for Value-at-Risk and Conditional Value-at-Risk: A Review journal August 2014
Non-intrusive low-rank separated approximation of high-dimensional stochastic models journal August 2013
Gradient-based optimization for regression in the functional tensor-train format journal December 2018
An Interior Point Algorithm for Large-Scale Nonlinear Programming journal January 1999
Measures of Residual Risk with Connections to Regression, Risk Tracking, Surrogate Models, and Ambiguity journal January 2015
An active-learning algorithm that combines sparse polynomial chaos expansions and bootstrap for structural reliability analysis journal November 2018
Using Cross Validation to Design Conservative Surrogates journal October 2010
LIF: A new Kriging based learning function and its application to structural reliability analysis journal January 2017
A scenario optimization approach to reliability-based and risk-based design: Soft-constrained modulation of failure probability bounds journal December 2021
Deep Learning of Parameterized Equations with Applications to Uncertainty Quantification journal January 2021
Estimation of small failure probabilities in high dimensions by subset simulation journal October 2001
Structural reliability assessment through surrogate based importance sampling with dimension reduction journal March 2021
Existence and Optimality Conditions for Risk-Averse PDE-Constrained Optimization journal January 2018
Stochastic Dominance Constraints in Elastic Shape Optimization journal January 2018
On buffered failure probability in design and optimization of structures journal May 2010
On confidence intervals for failure probability estimates in Kriging-based reliability analysis journal April 2020
The future of risk assessment journal September 2018
Risk-Adaptive Set-Based Design and Applications to Shaping a Hydrofoil journal August 2017
On the convergence of generalized polynomial chaos expansions journal October 2011
An adaptive local reduced basis method for solving PDEs with uncertain inputs and evaluating risk journal March 2019